Marine energy-saving water supply system and cruise ship comprising same

The invention discloses a marine energy-saving water supply system and a cruise ship comprising the same. The marine energy-saving water supply system comprises a pressure water tank device, a plurality of user sides, and a water supercharging device; the user sides comprise high-layer user sides and low-layer user sides; the water inlet end of the water supercharging device is fixedly connected and communicated with the water outlet end of a pressure water cabinet device, the plurality of high-rise user sides are fixedly connected and communicated with the water outlet end of the water supercharging device; when the water pressure does not meet the water pressure requirement of the high-rise user sides, the water supercharging device starts supercharging; and when the water pressure meets the water pressure requirement of the high-layer user sides, the water supercharging device does not start supercharging, and the pressure water tank device is fixedly connected and communicated with the low-layer user side